托福习题练习

托福考试易错题(2018/9/3)
1题: Statistics indicate that approximate every 22 years--within a range of 3 to 4 years--a major drought occursin the United States.
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2题: One of the basic principles of wildlife conservation involves ______ adequate natural food and shelter to maintain populations of each species in a given habitat.
A.(the provision
B.(that provision
C.(to provide
D.(providing
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3题: (Heat) exhaustion is (causing) by excessive (loss) of body (fluids) and body salts.
A.Heat
B.causing
C.loss
D.fluids
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4题: The Medicare program (was established) in 1965 to (helping) elderly United States (citizens pay) the increasing (cost of) health care.
A.was established
B.helping
C.citizens pay
D.cost of
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5题: ___________ are chiefly derived from petroleum.
A.( Plastics today
B.( There are plastics today
C.( Because today plastics today
D.( Due to plastics today
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